bpo-32720: Fixed the definition for width and precision in format mini-language doc (GH-5482) (GH-5524)

Changed the definition of width and precision from "integer" to "digit+" in format mini-language doc.
(cherry picked from commit 8b5fa289fdb04b6b919cf95fa99246aa872e47a8)

Co-authored-by: nathankerr96 <nathankerr96@gmail.com>
1 file changed